How To Make The Best Stuffed Acorn Squash (High-Protein Fall Dinner)

Thanksgiving Flavors on a Tuesday Night

Every fall I buy acorn squash because they look so pretty at the market. Then they sit on my counter for two weeks while I figure out what to do with them. This Stuffed Acorn Squash finally solved that. It’s now the dinner I make the minute the weather turns cold.

Each squash half roasts until it’s sweet and tender, then gets filled with savory turkey sausage, onion, celery, sage, quinoa, spinach, tart cranberries, and toasted pecans. A blanket of Parmesan goes golden on top. It tastes like Thanksgiving stuffing, but it’s full of protein and fiber and naturally gluten-free. And the squash is the bowl. Fewer dishes for me.

It looks fancy. It isn’t. Let’s make it.

Essential Ingredients and Kitchen Tools

For the Roasted Squash:

• 2 medium acorn squash (about 1 1/2 lb / 680 g each; pick ones that feel heavy for their size)
• 1 tbsp extra virgin olive oil
• 1/2 tsp kosher salt and a few cracks of black pepper

For the Sausage and Quinoa Filling:

• 1 lb (450 g) Italian turkey sausage (casings removed; or ground turkey plus 1 tsp fennel seed)
• 1 tbsp extra virgin olive oil
• 1 small yellow onion and 2 celery ribs (finely diced)
• 2 garlic cloves (minced)
• 1 tbsp chopped fresh sage and 1 tsp fresh thyme (fresh herbs really matter here)
• 1 cup (185 g) cooked quinoa (about 1/3 cup dry; leftover rice works too)
• 2 packed cups baby spinach (roughly chopped)
• 1/3 cup (40 g) dried cranberries (reduced-sugar if you can find them)
• 1/3 cup (35 g) chopped pecans
• 1/2 cup (45 g) finely grated Parmesan (divided)

Kitchen Tools:

• Large, sharp chef’s knife (and a steady cutting board with a damp towel underneath)
• Rimmed sheet pan lined with parchment
• 12-inch skillet
• Sturdy metal spoon (for scooping out the seeds)

Stuffed Acorn Squash

Roasted Stuffed Acorn Squash filled with turkey sausage, quinoa, sage, spinach, cranberries, and pecans, then baked under golden Parmesan. A high-protein, gluten-free fall dinner.

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Prep Time 15 minutes mins

Cook Time 50 minutes mins

Total Time 1 hour hr 5 minutes mins

Servings: 4 servings

Course: Dinner

Cuisine: American

Calories: 520

Ingredients Method Notes

Ingredients

  

Squash

• 2 medium acorn squash halved and seeded
• 1 tbsp olive oil
• 1/2 tsp kosher salt black pepper

Filling

• 1 lb Italian turkey sausage 450 g, casings removed
• 1 tbsp olive oil
• 1 small yellow onion and 2 celery ribs diced
• 2 garlic cloves minced
• 1 tbsp fresh sage 1 tsp fresh thyme
• 1 cup cooked quinoa 185 g
• 2 packed cups baby spinach chopped
• 1/3 cup dried cranberries 40 g
• 1/3 cup chopped pecans 35 g
• 1/2 cup grated Parmesan 45 g, divided

Method

 

1. Roast: Halve and seed the squash, brush with oil, season, and roast cut side down at 400°F (200°C) for 30 to 35 minutes.
2. Brown: Cook the sausage in oil until browned, 5 to 6 minutes. Add onion and celery for 4 minutes, then garlic and herbs for 30 seconds.
3. Mix: Stir in the quinoa, spinach, cranberries, and pecans until the spinach wilts. Off the heat, add half the Parmesan.
4. Fill and bake: Turn the squash cut side up, fill generously, top with the remaining Parmesan, and bake 12 to 15 minutes until golden.

Notes

• Microwaving the whole squash for 3 minutes makes cutting much safer.
• Check your sausage label if you need it to be gluten-free.
• Pour off any liquid in the roasted halves before stuffing.

Kitchen Shortcut: Use a pouch of ready-cooked quinoa or leftover rice. You skip a pot and save 15 minutes.

Pro-Chef Tip: Rinse and roast the squash seeds with a little oil and salt at 350°F (175°C) for 12 minutes. They make a crunchy free topping for the finished squash.

Nutrition is an estimate per Serving, 1 Stuffed Half.

Step-by-Step Instructions

Step 1: Cut and Roast the Squash

Heat your oven to 400°F (200°C). Acorn squash is tough, so poke it a few times with a fork and microwave it for 3 minutes. It softens just enough for your knife to glide through. Cut each one in half from stem to tip and scoop out the seeds and stringy bits.

Here’s a mistake I made the first time: I roasted the halves cut side up. The edges turned dry and leathery before the middle was tender. Brush the cut sides with olive oil, season with salt and pepper, and place them cut side down on the sheet pan. They steam in their own skins. Roast 30 to 35 minutes, until a knife slides easily into the thickest part.

Step 2: Cook the Filling

While the squash roasts, heat the olive oil in your skillet over medium-high. Add the sausage and break it into small crumbles with a wooden spoon. Cook 5 to 6 minutes, until no pink remains and some pieces are browned and crispy.

Add the onion and celery and cook another 4 minutes, until soft. Stir in the garlic, sage, and thyme for 30 seconds. Then add the quinoa, spinach, cranberries, and pecans and stir until the spinach wilts. Turn off the heat and mix in half the Parmesan. Taste it. It should be savory, a little sweet, and full of sage.

Step 3: Fill and Bake the Stuffed Acorn Squash

Flip the roasted halves cut side up. If any of them wobble, slice a thin sliver off the round bottom so they sit flat. Pile the filling into each half, pressing it down gently and mounding it up high. It’s okay if some spills over the edges.

Sprinkle the rest of the Parmesan on top and bake 12 to 15 minutes, until the cheese is melted and golden. Let your Stuffed Acorn Squash rest for 5 minutes before serving. One half per person is a full meal. For another cozy fall dinner, my Apple Cider Pork Chops are always a hit.

Frequently Asked Questions

Make-Ahead and Storage Tips

• Make ahead: Roast the squash and cook the filling up to 2 days early and store them separately. When you’re ready, fill the halves and bake at 375°F (190°C) for 20 to 25 minutes, until hot through.
• Fridge: Store leftover stuffed halves in an airtight container for up to 4 days.
• Freezer and reheating: The filling freezes well for up to 3 months, but roasted squash turns watery once thawed, so freeze only the filling. Reheat stuffed halves covered with foil at 350°F (175°C) for 15 to 20 minutes. The microwave works in a pinch, but the top loses its crisp.

Disclaimer:

Nutrition information is an estimate calculated from the ingredients listed and will vary with the brands and portion sizes you use. This recipe is shared for general information and is not medical or dietary advice, so please check with your doctor or a registered dietitian if you have specific health needs.